Photodisintegration of helium-4 into proton and triton
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The 4He(Î³,pt) reaction has been measured at EÎ³ = 167 - 209 MeV, using the tagged bremsstrahlung photon beam of the Saskatchewan Accelerator Laboratory (SAL). Cross sections were obtained for the four centre-of-mass proton angles 87Â°, 104Â°, 120Â° and 137Â°. The experimental apparatus consisted of a liquid helium target and two arms of plastic scintillator Î”E-E detectors, arranged on opposite sides of the target. Coincident hits in both detector arms were required to generate a trigger. In order to quantify the low detection efficiency for tritons, the experiment was simulated by using the GEANT detector simulation system. The extracted cross sections were compared to previous measurements.